市内变电站接地系统的设计和分析  

Analysis and Design of Urban Substation Grounding System

作　　者：周亮[1] 徐骏 刘垚 付龙海 李业旭 Farid Paul Dawalibi ZHOU Liang XU Jun LIU Yao FU Longhai LI Yexu Farid Paul Dawalibi(State Grid Shanghai Economic Research Institute, Shanghai 200120, China State Grid Shanghai Electric Power Design Co., Ltd., Shanghai 200025, China Beijing Jiahua Saishi Safety Engineering ＆ Technologies Co., Ltd., Beijing 100080, China)

机构地区：[1]国网上海市电力公司经济技术研究院,上海200120 [2]国网上海电力设计有限公司,上海200025 [3]北京加华赛时电力安全技术有限公司,北京100080

出　　处：《电网与清洁能源》2016年第12期28-33,共6页Power System and Clean Energy

基　　金：国家青年科学基金项目(51507100)~~

摘　　要：为了更好地进行市内变电站的设计和分析,介绍了市内变电站接地系统的基本设计流程,重点讨论了进行市内接地系统设计分析与常规郊区接地系统相比需考虑和出现的新问题。分析结果表明,与常规的接地系统相比,在进行市内接地系统设计时除了要考虑各种常规因素外,还需考虑可能的多块土壤结构、各电压等级电缆在故障电流分布计算中的影响,以及考虑电站入地电流对周边构筑物以及民用设施的安全影响等方面,否则会对电站评估安全计算结果带来显著的误差,遗漏周边安全性评估等,造成安全隐患。In order to design and analyze the urban substation better,this paper introduces the basic design process for the grounding system of the urban substation, focusing on factors to be considered and new problems in the design and analysis of the grounding system compared with the one for the conventional substation in the rural area. The analysis shows that compared with the conventional grounding system, the grounding system of the urban substation should take consi-deration of not only those conventional factors,but also the possible multi-block soil structure,effects of cables of different voltages on the calculation of the fault current distribution as well as safety effects of the grounding current on the surrounding structures and civil facilities,otherwise remarkable errors would occur to the substation safety assessment and evaluation of the surrounding safety would be missed and hidden safety risks could be formed.

关 键 词：市内接地系统 故障电流分布 GIS 土壤结构 传导干扰 地电位升 

分 类 号：TM862[电气工程—高电压与绝缘技术]